如何移除Kivy上的某些按钮？

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout

class MyBoxLayout(BoxLayout):
    def remove_button(self, button):
        self.remove_widget(button)

class MyApp(App):
    def build(self):
        layout = MyBoxLayout()
        
        # 创建按钮
        button1 = Button(text='按钮1')
        button2 = Button(text='按钮2')
        
        # 将按钮添加到布局中
        layout.add_widget(button1)
        layout.add_widget(button2)
        
        # 移除按钮1
        layout.remove_button(button1)
        
        return layout

if __name__ == '__main__':
    MyApp().run()